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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f4295664300ed45d301edc9edd77c8fa0d05348bd404ef58159736e0e66445ba' 
  AND token = 'Ap6UamMVqQhtRGYX2WL30mqkbHnUWyqlI5qkgi8QmU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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