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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59da4ad0ce0abe6ad294ca28ba8aeaeb1a5d77c74372dca22a24e597d01d7930' 
  AND token = 'pjtGrWG1E0jE8X3Z5qP73E8FL3EDln9Zb3WDE5qy7pU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}