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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b22b75784efceb45fd6da6c4aa6650489f3947a7eb581d22596e2607bc550030' 
  AND token = 'CZ0bcBjPEZ94XbF63MSmeSzTKj7j7mNSkPe3YLxvE60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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