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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0af44b905ed8707fe23b2e359764affd33a00fbbaf3f8c4d1c9e812d4d253bcb' 
  AND token = 'ziPqNjHHFUtn2Krcmmp4codxSPBFdTfjFtdv4jDw+ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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