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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c0910ed78a20dab1a8e55a00293fc9a961df5dceb68264daa38376cc85b5451' 
  AND token = 'qoB9/D2jaCnF5itEBKhRS8GBiMDQGxy24l3dIppVrrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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