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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7085f886db6ea0fb13687e3f02989cc4bff7b794d6ccd27533d2c10d76c2f8ff' 
  AND token = 'oR0uDb/TJjcbPTAxHPsAGtp2u2SYZI/jTJyM4VMbCOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}