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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a109e272326041059e0c44faad269c4d0987660c823b6ec762ae731fb4bf7b68' 
  AND token = 'tFo8T6QID0nvQ8WozVe399MLICHG1vAMS6fSxpkyyLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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