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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a9c2aa6f60af0d3c9c7c2b487987d4ebb99844a8a830a50ceb3fe861078023e' 
  AND token = 'iugltgiymD+4Z63fR3wV61/so/PEe5dKMNYJXF7Hf4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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