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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ede96652a1d81ec4220c5ea89ed44832c48fc55e76a6f85d50e64a7c2c6d700b' 
  AND token = 'AWt5a8BcS2rHc92Z3OGKrO1w8PhzWsaP2gLKShCP39g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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