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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca8ac74ba0240820e446562740b5a4fa97ad621a3e644cc107f34d997a89c87a' 
  AND token = '3E7sftEuV91NR6MGJvku1Js1f13VJWjxrZIUSFN2HN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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