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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '575cffcdf18c8b49f4cc613ce581b18e247741719694f8dc676ce9db134f379b' 
  AND token = 'F81S25VtywLbXVgTjyS0HvYQlX8hd0Fq8xW7owHtYXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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