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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90da0d45309c25c2c1f93173646d95af84c0f20000ce24f3a3f3c1951667f1ab' 
  AND token = 'W5DA/TiEoi/HogN/s5OVF/hp4AgdickL7Hs8xFLN1+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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