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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9f7467951eb85958ebb01c64738b57d4164bd59d15df5a14f03464e94187d96' 
  AND token = 'aE9Qb3t/1mVJFup1r3o3g4Kh4+lJN1fLJh6hx3wB2z8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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