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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad911c990f57385f1aab378bd606851d64535ccbba55ad49de1510e28fa92887' 
  AND token = 'Js2Ve3UnYYzLI+lYWPfWF9OFT4aUCr/F5bf/ZND1Lns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00126

JSON explain

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