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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dbadf2307944bd6d5fbc8c20ae27e874b7874630662d092c582a166dd2b26186' 
  AND token = 'vOGJchyvQ1NH4MLbLXM0hQ876Ze6gpOkRaqqUVAlL3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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