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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '694c790deaea3d773509d92be285cde22ad7e483199dec902047def8ad895fa8' 
  AND token = 'Q13psmcaMkNuOIgRSW3ho1rqlHAhgtvmr05We1oiyM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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