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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca841c01fa7315f2b95a269540fde8555a9319027de70781ac75f6c5eb2bb33c' 
  AND token = '7Pt+S4/zIktijVHmgSn+WHvrQjnSaL+90TaPf7mO0eI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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