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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6e1bdf9cbcba6c60ab5061f7af3d429a2bea622bab56b53ed22b2356396d3c5e' 
  AND token = '80uyEeRbMMeWxYsnSXaCWfBOHqPIdBt90Z/BnYGS+Qw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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