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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2ec4003fc746f8e181bcf168f86401fb561fd794c683ab054119aabb2110dd5' 
  AND token = '0eq5LZIYLaezB+G93VkhHEieLG8smshgqNBNZzfZMfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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