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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d1552ef0aaa514a562531c6a2e8fd88b3d6cfd5656b078b0169d7b609daac3e' 
  AND token = 'fAoO67TXO1N8YG944UemZd4tw4p0+VgJpVtteArZWV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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