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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ed5e0bb5b7aa554b16ef2c1679a7d225b69674a741bb0fbf1257ff96950a25c' 
  AND token = 'cyiOBALRGuL2x8nphcizd+VRs7N6wj4c+sReeTnWyE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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