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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb07d5ab264d4dfbe07ee8de34dcf33da9f56f1e23290f7e89d1412039aaaad9' 
  AND token = 'b3uBpL/WHWzWyzifcQj5VV/7iJZH/BlQusTr6FlO2o4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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