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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '050a338fcc7c56bbc4668ce5380467376934cb95ce636a3939f6a37e1cc8fd15' 
  AND token = 'GzSWk8Z9yoP/AFcGYPOm4qU7WVuUHMixll05mabs3XQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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