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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4bddb2d21df52c172b19d00200873631d0fecd494f42b932e1ef454feabed150' 
  AND token = '6tjdDZidTtjtS/QL2Q/aaGkWLy9m4QrPencCj5bV5hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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