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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b80ac12155b5fcb1d185a710d06b3272bd8772fa751cf88586a57bea53ba1051' 
  AND token = 's09J/kMNM5TIUBonCx9C1SPxSM45rJrqA5l2vwBra/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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