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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60ab5797b8c755dc231f4fc4f3dbd524662ac48df8454d6b2d54140b61ab13f1' 
  AND token = 'x+k2Pjba20hNLq9cci00Vh337MuURZa7zJTaWp0q2Ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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