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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f06094a088127aa94bba2a1465574debb7a939c296ef619381de5cd6871ea818' 
  AND token = '8Ge6yA+ATmTtXl52N5XIWHl3pARIKeB1YDA9INwrNeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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