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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c009c525cf4e5feec9182b2e5aa97167ed4d896556fde454655e8b82ac9e1a3e' 
  AND token = 'GOuWSYefUI1ahdRAQ6TzYseE9GqEkFUE/IFO8eJ/kkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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