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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37e3fb58212b9198bd5e55ade9f258354c5e2c775a79fb85abdc762750f2fbe5' 
  AND token = 'DHXWLe/ge053hhv4hk1oA+no30Sl6y5gLYPK1oIPvVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.02980

JSON explain

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