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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a49f37fe0991ec4be54b4bd9b7d52d871ad7b7fd4aafe2dfbd8db07a6c0813f9' 
  AND token = 'i9KIJsHMUOOF3B50cJA13muF4XIDmv3e5AliM4gxtqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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