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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '45144999e0c5aa4d7f525e1f339aec28b332f7bf5cf9dbb2a3a64a61fbbd51c2' 
  AND token = 'CBMJgvmXNeZlEIY3oi5QyLuMNbxO/LX4u4fk2qO8jf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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