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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7232af2f053dba0b485136b5d13021bb0b022ade7e900b1559bf4e2266d5673a' 
  AND token = 'eAbIAlq4tHkxfpE3eng3j7qcF+zpEscNo3j8eIpQwx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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