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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f33301bd6065f816e113d2848c88aa3b9ce34ff83330531d0bf7a5909f9e5e49' 
  AND token = '5/Uv2bRTefrx3Ops+M8bg0sW8V36ql+cDsjSPflrmA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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