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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee141eddb165868e2154c42d409e347474aa4a5f0b72f47d1b3135d39fa2d6af' 
  AND token = 'HPWJCCvOIoO7j5cjW3mA46N/nyO0JdZA20A4Z40VqO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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