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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09ee40e7d77ef1eb5f56d8de014dedcaa25431f168eebf904dfa6b716fdd0b8e' 
  AND token = 'RtmRNiZcWanfl/D8tZ4MViKnXcQ4qMNTJTrAfOP83/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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