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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46697014a0b0f9fc0b06f9f74f321f1efde31fcc6a2ea6b3c3399ab72b1d05eb' 
  AND token = 'vsha45YD7pGnCg+a92s52VvtW/2Ym8j0ZEPSdUP+CMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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