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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89295a1713d069a396d37c7f0ecb333d6e014851bb7ce3a2a0482adbb9e40490' 
  AND token = 'jc7CZnB5dk5wd5a8J2J2X2nYvOtlpceeqiPDUAYjGnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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