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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9df48ec456f0360d32b55e19f4d9cc64634c72fb81682683a39d8c231f40dc2' 
  AND token = 'E/J8L/4S/jBidnfHpIN1ADdLylMrr6T2oM/Pa8U5QE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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