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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f14009da0e34abd88e58427fa93f1f8412acc4c82df49259ecf37bfed80494e3' 
  AND token = 'qroZ4k91rjqdsN8lpY7f81rNg3vuUBqRJTGIGtKqCN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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