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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e35306c506923e9113c4667efd498127b0e379639dd3fff16f10ec2ea9693f50' 
  AND token = 'MI1m7HVF7aEr3ldK3T86e0leLPzvGcqRxCn4J+6ikVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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